On Wed, Jun 13, 2018 at 12:26:13PM +0800, [email protected] wrote: > From: Gao Feng <[email protected]> > > The helper module would be unloaded after nf_conntrack_helper_unregister, > so it may cause a possible panic caused by race. > > nf_ct_iterate_destroy(unhelp, me) reset the helper of conntrack as NULL, > but maybe someone has gotten the helper pointer during this period. Then > it would panic, when it accesses the helper and the module was unloaded.
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